Trimming press and die arrangement for same



' Nov. 21, 1944.

u. D. FOSTER TRIMMING PRESS AND DIE ARRANGEMENT FOR SAME 8 Sheets-Sheetl SINLE Rt'VOlUT/ON CLUTCH NEC'HAN/fiM i am I 74" I I I Zll, g z; 9," 40ii 60 2 o Q o 0 Z 4 J'Zi Q o o 7- I! I I 56' 1 I l 10 fiver-mgr) Uzi D.13s 2* Nov. 21 1944. u; D. FOSTER 2,363,407

TRIMMING PRESS AND\DIE ARRANGEMENT FOR SAME Filed June 25, 1945 8Sheets-Sheet '5 Nov. 21, 1944. u. D. FOSTER 2,363,407

TRIMMING PRESS AND DIE ARRANGEMENT FOB SAME Filed June 25, 1945 sSheets-Sheet 4 Nov. 21, 1944. u. D. FOSTER TRIMMING PRESS ANDDIEARRANGEMENT FOR SAME 8 Sheets-Sheet 5 Filed Jude 23, 1 945 g5, 61 fi 64v14 W v m Nov. 21, 1944. D, FOSTER 1 2,363,407

TRIMMING PRESS ANDDIE ARRANGEMENT FOR SAME Filed June 23 1945 8Sheets-Shae? 6 Nov. 21, 1944. u. b. FOSTER TRIMMING PRESS AND DIEARRANGEMENT FOR SAME Filed June 25, 1943 &

Patented Nov. 21 1944 sTATss PATENT OFFICE TRIMM ING PRESS AND DIE,ARRANGEMENT ronsAMEy I Uri D. Foster, Ilartford, Conn, assignor to TheArrow-Hart &' Hegeman Electric Co Hartford, Conn., a co'rporation ofConnecticut Application June 23,1943, SerialNo.491,998.

35 Claims. (Cl;'164--48 In modern manufacturingof nietal articles fromsheet metal, by stamping blanks therefrom, it frequently becomesnecessary to trim hollow blanks, to size or shape or to removeadditional metalfthelreirom. These secondary operations'are performedafter the blank hasbeen stamped gen erallyinto shape in original orprimary stamping operations. l

. Myinvention-relates, to presses for carrying out the secondarytrimming,v shaping or forming; op, erations and the.1;ike,, and, to the;arrangement of dies and ,associatedparts. in. such presses, where metalmust be trimmed or: shaped on oppositeor adjacent,'or= on opposite andadjacent sides, walls or surfaces of blanks, particularly "hollowedblanks or stampings.

It is an object of 'my'invention to provide-an improved pressmechanismfor moving dies to trim or shape blanks, particularly hollow blanks, ofmetal,plastic or other materials where the shaping, trimming or formingmust be done on adjacent or, opposite; or adjacent and opposite sides,walls, or surfaces of the blank.

Another object is 'to provide an improved a'rrangement' of dies, partsand mechanism to move same'in a press where the foregoing trimming;

shaping or forming operations are to be performed.

Anotherobject is to provide an arrangement,

,mounting and mechanism for moving die parts in multiple directions,such as back and forth and transversely, so'as'to shear, cut,. trim orform a hollow or cupped blank'inj multiple directions in one machineand, in one placement, of the blank so. that in many cases when theblank is removed itwillbe completely formedand trimmed.

Among the many other objects-of my invention are the creation,arrangement and improvement inthe, form, combination and operaticneof,in adiepress for carrying out the foregoing shap- 7 ing, forming andtrimming operations.

Otherobjects; will; become apparent as, the in vention is described inconnection with the.-accom-partying drawings. 1

In the drawings- Fig. 1 is: a perspective-viewer a press embody ing theinvention; r I

Fig. 2' is a perspective view of trimmed by the press ofFig.11;

. Fig. 3 is aiperspectiveview of.- the blank, aiter trimmina. oi Fig. 2:and also; showing the'scrap a blank to be or trimmed portion;

. Pig. 4 is a perspective view looking down on I being separatedfrom'the die;

the; die; from insertsior the. upper die;

the front of the, presslshown; in Fig. 1:; t x f '5 is an exploded viewof; the lower die and I the mounting; of the whole assembly of elementswhich carries the lower-die; I

Fig- 6'isa plan view ofcthe parts: shown in Fig. 5 when they areassembled;-

Fig. 7 is a transverse sectional view'taken along lines 1'-'| of'Fig. 4;i

' Fig. 8 is a'perspective view; of one'of the-lower die'inserts;' I rFig.9 is a bottom plan'view of the upperdie and its mounting bracket; 9t

Fig. 10 is a vertical sectional view,- taken transversely through theupper die and its] mounting bracket, 'along line |0-l0 of Fig.9;

Fig-11' is a horizontalsectionalview-taken along line ll- -l-l ofFig.'10; I g

Fig. 12 is a perspective view showing the bottom portion of the upperdie and: its" foot, the toot Fig.- 13 is a perspective view of one ofthe Fig. 14; is a perspective View of the key. insert of Fig. 13'inverted; r j 1 Fig. 15 is a fragmentary sectionalfview similar to Fig.'l but, with the upper diein" depressed position ready for the trimmingoperations;

. Fig. 161s a horizontal section view through. the upper dieand blank ona line similar to l.l.-,H of Fig. 10 when the upper die is depressedinto the. cutting position of Fig. 15;. v f

,Figs. 1'7, 18, 19 and 20 are. views similar to Fig; 16 but showing thedies in their four cutting or trimming positions; p p

Fig. 21is a fragmentary perspective View show: ing the blank to betrimmed when positioned within the lower die, and with. the foot of theupper die within the blank but removed trom the upper die; and

Fig. 22is aplan, view of the machine. ofFig'. 1 showing. only-the lowerdie and the press-parts that are onlevels below said lowercdie;

In v the, followingjdescription like reference numerals refer to: likepartsin the several figures.

- General description Presses to which. this invention relates, fortrimming or otherwise working upon, 'formed blanks, have a.conventionalframeworkau with vertical guide surfaces to guide thevertical rising andfalling 0t afslide: 32: which carries the upper dieelements 40. I 1

The slide 32 is: operated, in the machine illustrated, by a main shaft34 turned by a single revolution clutch 36. Since the single revolutionclutch is a well-known mechanism, it need not be described in detail. Inoperation, when the clutch is engaged (as by the machine operatorputting her left and right hands on knobs, such as r, on the ends oflevers r and L) the shaft turns one revolution and the clutch thenautomatically disengages itself, whereupon the shaft stops.

According to the present invention, there is on the main shaft 34 alarge cam 38 whose surface engages an anti-friction roller 39 mounted oncam plugs l-6 in the form of cylindrical pins the vertical slide 32. Thecam 38 is of such shape that when its low surface 38b (Fig. 1) is inengagement with the roller, the slide will be held in its uppermostposition by powerful springs 31 provided for that purpose. When the cam38 rotates, its high surface 38t comes into engagement with the roller39 to move the slide down and hold it there during the die cutting ortrimming operation. Thereafter it rises again as the low surface engagesthe roller. The up movement being powerfully carried out by springs 31is dampened by an air dash pot (not shown).

The driving mechanism also includes a .two-

winged cam on the main shaft 34 which is engaged by a roller 50 mountedon the end of a lever 52 that is-pivotally mounted on a bracket 301) onthe frame 30 of the machine." pose of this cam and lever arrangement isto drive a pawl 33 (Fig. 6) which will revolve a ratchet 90 in steps tomove the lowermost of two cooperating dies, as will hereinafter be morefully described.

In employing the -invention to trim a blank B, such as is shown in Fig.2-,.to produce the casing body C, shown in Fig. 3, four cuts are made,by relative movement of the two cooperating dies 40 and 60. The top dieis carried by the vertical slide 32 and upon being moved down by theslide preparatory to the cutting or trimming operation, it remainsstationary until the cutting or The purtrimming is completed. The bottomdie 60 carries the blank which is to be trimmed and is movable back andforth and also crosswise at right angles to the back and forth motion.For such purpose the bottom die is mounted in a horizontally movableslide 10 which is mounted for sliding movement back and forth within asecond horizontal slide 80' whose direction of motion is crosswise (orat right angles to the direction of motion of the first horizontal ordie carrying slide). v

The cuts are made by moving the bottom die 60 and the blank first to'theright, then to the left, then forward, then backward, while the top dieremains stationary. I

Referring to Fig. 2, in a typical operation the movement of the bottomdie 60 and the blank to the right causes the first out, which trims theopposite or left lug and the adjacent edges of the blank around to thetop and bottom lugs. The next movement of the die and blank is to theleft and causes the second cut, which trims the opposite or right'lugand the adjacent edges around to the top and bottom'lugs. The thirdmovement of the die and blank is forward and causes the third cut totrim the top (or back) lug and the adjacent edges. The fourth movementof the die and blank is backward and causes the fourth out, whichtrimsthe bottom (or front) lug and the adjacent edges, completing thetrimming of the blank.

For reasons as will hereinafter become clear,

that are mounted in a rotary assembly that is rotated step by step by aratchet member 90 in response to reciprocations of the pawl 33 which isdriven from the driving mechanism by the two-winged driving cam 35heretofore mentioned.

Detailed description of the mounting assembly for the die parts and themovement thereof The mounting of the whole assembly of elementswhichcarries the lower die parts is upon the bed plate of the machineframe I 00 (see Figs. land '7). The foundation or bottom member H0 ofsuch assembly has a rectangular bottom portion H2 (see Figs. 5 and 7)from the surface of which a circular flange H4 extends upwardly formingan oil reservoir, to provide for lubrication of the sliding surfaces.The inner surface of the flange is machined and tapered or inclinedtoward the center of the member, and receives in rotary sliding relationa complementally-tapered surface of a cam-carrying ring or holder I20,whose top surface lies flush with the top surface of the flange I I4.

To hold the cam holder or ring I20 in location, a circular shoulder I22is formed on its inner peripheral surface by recessing the inner topportion of the holder; Overlying said shoulder is the circumferentialflange I32 of a retaining ring I30 which seats on and is secured to acircular rib H6 raised from'the bottom of the reservoir member 0.

Seated and secured upon the upper surface of the rotary cam holder I20is a fiat ratchet ring 90. made in segmental sections, each of which isbolted firmly to the cam holder'. Both the ratchet 90 and cam holder I20are drilled vertically at spaced points around and intersecting theinner peripheries thereof for the reception of cylindrical cam plugs l6inclusive. These plugs are notched (as at (in) in the area opposite theretaining ring so as to permit the rotation of the cam holder I20, theratchet 90 and the cam plugs together, while the retaining ring I30remains still and holds the cam holder I20 within the flange I14 of thereservoir member H0.

To permit insertion of the cam plugs the retaining ring I30 has itsperiphery recessed adjacent the cam plug borings, as indicated at I34.

For the purpose of guiding the back and forth movement of the die 60, itis mounted on an upper slide member 10 which is of elongatedhexagonal-shape (see Fig. 6) and has wedgeshaped or sloping side walls14 (see Fig. 5) dovetailing within an undercut channel 83 in a lowersliding member 80. The ends of the upper slide are horizontally slottedas at 16 to receive antifriction rollers 12 that rotate on verticalaxles transverse of the end slots. The lower slide member is ofelongated hexagonal shape and has its ends horizontally slotted foranti-friction rollers, in like manner to the upper slide member- I Iwithin me area. encompassed by the circular ribl H56 The position. ofthe. slide holding member IMt may be. determined by dowel pins l lt'placeddn the floor of: the rescr toir member I IIII and:v received. inholes the bottom ofthe slide holder I40.

' As the cam-holder I.-2l[rotates (see Fig. 6=)-, the plugs I--Ii"strike the anti+fricti0n rollers. fit, 8:2; and It, I22 The camplugsI.--8 are ofzsuch. number andtpositio'nthat after one plug acts to moveon slide in one direction, the next-ca1rr to act will act on the rollerat the opposite-end of the same slide to move it in the oppositedirection. The third cam to act may engageone roller of the other slideto move it to 'one side, and the fourth cam to act will engagethe'rcller at the-opposite end of the said other Slide to move'it' tothe other side. No two cam plugs can be spaced apart the exactdistanceof; any slide roller from any other slide roller, since only one camshould act at one I 55 has a dovetail slot receiving and guiding thezicsite every cam plug, as at 9I- (see Fig. 6), so v as to receive theanti-friction rolleropposite whichever cam plug is actingat the moment,

Return of the-slide to central position after each movement isaccomplished by the anti-friction roller; which at the momentjis in arecess, engaging the trailingside of' the recess as the ratchet rotates.j

Thus, any camplug I will move any slide 80 by engaging one roller 8I,"whereupon the opposite roller 821's received in a recess 9|diametrically opposite the then active coupling I. On

- continuing rotation, the i'jrailing side of ratchet ring recess 9Iengages the received roller 82 and reyersely moves the slideBU- until itis again in central position. Then the nextcam 2 may act the slide willbe, moved in corresponding Spouse of any slide to the action of any camand to the ratchctbeing, the same in every case, except as to directionof movement of the particular slide.)

. With the foregoing arrangement, and with the cam plugs placed,for'example at 0, 44, 104; 164, 240, 300, approximatelyc if thetransverse orlower. slide 80 is: first moved to the right by cam Iengaging roller 8|, said. slide will next be moved to the left by cam 2engaging roller 82'; then the back and forth or upper s ide It will moveforward by cam. 3 engag ng roller TI and will move rearwardly by cam 4.engagin roller T2. The. ratchet will. have moved through 60 in causingthe foregoing slide movements. v

During the next 60? ratchet movement, cam 5 will engage roller 81 tomove, transverse slide Bllflto the. right; then cam 6 will engage roller82 to move said slide tothe left; then cam I will come into action forthesecond time, enagin roller 122011 the lower slide 10, movingitbackward; then cam 2 will come into action for the second time,engaging roller II to move slide 1'0 forward.

The two foregoing 60 movements will have moved the slides for'completingthe trimm ng of two blanks. f

From the foregoing, the operation of the slides Eythe cams I-6- duringthewhole 360 rota.- tion' of the ratchet can be understood, as thepress. completes. operations on six blanks. and starts to repeat its".sequence. I

The steprby step rotation. of the ratchet 9,0 is accomplished by thereciprocation ofa. pawl tooth'3'3 which engages in turn in. twelveequallyspaced notches 93, inthe periphery of the; ratchet. Thereciprocation of the pawl tooth is ac.- complished by pivotally mountingit. on a. block 53 on the front end. of a reciprocated member 54 that ishorizontally slidable within a guide 55 aiilxed tothe side of the pressframe. The guide central bar portion of' the reciprocated member. 54;Additional guidance at the front of the reciprocated memberis providedby a hold-in plate 5372 and bracket 53b. The rear end of member 54 isprovided with a lateral extension 56 to the side of which a bar 5'I-,isattached. Between the end of'bar 5T and the member 54 one end of apairofparallel links 51a pivoted, their other ends being pivotallyponncctedto-a vertical lever 52 which oscillates and thereby serves toreciprocate the member'54. Oscillation friction roller. --The lever 52is pivotally supported at its center on the press frame by a bracket 58and pivot pin 59. Constant engagement of the roller50- with the wingedcam 35 is maintained by a tension spring 52s pulling the lower end ofthe lever 52' rearward. The

sudden retraction of the slide 54 by the springs 5119. may be dampenedby" an air dash pot D.

By the foregoing arrangement, the winged cam causes two-oscillations ofthe lever 52 to occur in every reciprocation of the main shaft andhencetwo steps of the rotation of the ratchetv llll are caused.Because-ofthe location and number of the push notches-93 for the pawl,in the ratchet the two steps amount to one-sixth of th full rotation ofthe ratchet, durin which sixth two cam plugswill have acted on each ofthe four slide rollers TI, 12,. 8|, 82

Exact positioning of the lower die parts and hence of the mountingtherefor is important. Since the push imparted by the pawl to'rotatetherelatively heavy parts moved byand with the ratchet '90- would have atendency to cause those parts'to'be carried by inertia past theirintended position, I provide a safety stop mechanism comprising a latchI50 pivoted on'a station= ary part of the press; such as the bottommember H0, and moved by a latch operating bar I52 piv otally connectedat one end to the latch I50 and having at its other end a slot I54 andpin I56 connectedto the side 54 through the block 56 thereon. A springI58 connected at one end to the press frame and at the other end to thecentral part of the latch bar I52 constantly urges'the bar and latchagainst the periphery of the I ratchet 90. The periphery isprovided withaccurately placed notches-95, cut reversely to the direction'of ratchetrotation, in which the latch engages to stop the ratchet and associatedparts ratchet step, the latch will fall on the periphery of the ratchetand the periphery will ride under the latch until the next stop notch 95is encountered. Since the push notches 93 face oppositely to the stopnotches 95, the operation of the pawl 33 is not affected by the stopnotches 95, nor is the operation of the latch I50 affected by the pushnotches 93.

Detailed description of the die parts The following description is'ofthe die parts for trimming a hollow cup-shaped casing with lugsextending from the edges at the four quarters thereof. An untrimmedblank B is shown in per diagonally. The block seats on is bolted to theupper slide 10. A resiliently supported platform BI is received in thedie aperture 60a and normally is flush with the surface of the die. Theplatform is a mushroom-shaped part whose stem 6ls extends down through ahole in the upper slide 10 and has a disk Bld screwed on its lower endagainst which may press a compression spring 62 to hold the platformelevated. The spring 62 may be housed in a tubular spring guide orhousing 63 threaded at its upper end into the bottom of the slide 10 andits lower end is closed by a screw cap. Both spring and housing extendthrough openings in the lower slide 80 and slide holder I40, theopenings being large enough to permit the necessary relative motion ofthe slides 10, 80 and their motion relative to the slide holder'I4D.Screwed into the reservoir member H4 and surrounding the spring housing63 in an oil retaining pipe I Md.

The trimming of the lugs on the blank is provided for by placing fouridentical die inserts (designated generally by the numeral 64 andspecifically by the letters a, b, c, d) in channels in the die 60extending from the die aperture in the four directions that the die ismovable. The form of the inserts 64 is clearly shown in Fig. 8. Eachinsert is held in its channel by a horizontal securing bolt 65 threadedthrough the side wall of the die'block. The end of the bolt 65 engagesthe lower edge or surface of a diagonalgroove 64g in the die insertsloping toward the center of the die block, in order to exert a forcedownward on the insert and hold it in the bottom of its channel.Adjustment of the inserts 64 lengthwise of the channel is provided forby other horizontal bolts 65 threading through the side walls of the dieblock in alignment with the inserts. As the inserts 64 and the die block60 wear, it may become necessary to grind their working surfaces. Whenthe top surface of the die block is ground, the bottom surface of thedie insert, as well as the so that the dimension of the die insert abovethe die block will be the same as before; also the die insert will stillbe held down firmly on the bottom of its channel since the inclinationof the groove 64g will cause, the securing bolt 65 always to press onthe bottom edge or surface of the groove 64g'as the insert is movedinward, thus always providing a downward component of force.

' working end surface of the insert, will be ground The upper die isbolted on a bracket 4| that is, in turn, bolted to the vertical slide 32of the press and hence moves up and down with that vertical slide. Thelower or shearing portion of the die has the elongated shape of theblank B and hadpassagesways 4lla,"b, c, (1, cut in it in position toreceive the die inserts 64a to d and the cut lugs of the blank as thedie block 60 is moved in the four directions hereinbefore mentioned tomake the four trimming cuts on the blank.

For the purpose of pressing down the platform 6| within the die apertureof the lower die 60 and at the same time carrying the blank B down intothat aperture in position it will occupy during the trimming operationsand holding it there during those operations (see Fig. 15), a footmember 42 (see Figs. 9-12) is resiliently held against the bottomsurface of the die 40. The foot has a shape conforming to the blank B inwhich it is received and is movably held against the upper die 40 so asto be able to follow the movements of the lower die Bil and blank Bduring their movements in the trimming operations. For such purpose thefoot 42 is held by a rod 44 passing vertically through borings in thecenter of the upper die 40 and through the mounting bracket 4|. Ahemispherical end 45 of rod 44 holds the foot 42 in place, thehemispherical shape of the end 45 allowing sliding movement of the foot42 relative to the die 40, as hereinafter described. The upper end ofthe rod 44 is threaded to receive an adjustment nut 46 and a lock nut 41which compresses a spring 48 between upper and lower washers 4% and b,the lower 481) being cupped to receive oil and resting on the topsurface'of the die supporting bracket 4 I. A sleeve 49 around the topend of the rod 44 has its lower end rounded and received within a recess4|?" in the upper surface, so that when the adjustment screw 46 istightened to give about .001 clearance between the sleeve 44 and the topwasher 481,, the rod 44 and associated parts will swivel about the pointof engagement of the rounded end of sleeve 49 and bracket 4! as afulcrum.

To allow sliding movement of the foot 42 relative to the die 40 as therod 44 pivots, the end of the rod is tapered sufficiently to permit thenecessary movement in the desired directions.

To enable and also to guide sliding movement of the foot 42 relative tothe upper die 40, only in the predetermined paths of movement caused bymovement of the lower die 60, intersecting grooves 42a and b and 42c andd are cut in the top surface of the foot 42 at opposite ends, asindicated best in Fig. 12, to receive the downward extensions of keyinserts 43a, b, c and d that are located Within and slide within'thesame passageways 40a to d that were provided for reception of the dieinserts 64 of the lower die as those die inserts move relative to theupper die 40. The key inserts 43a, b, c and d can slide back and forthin the passageways 40a, 1), c and d when compelled to do so by movementof the foot 42 induced by the lower die 40. Specifically, the back andforth motion is caused by the extensions of the key inserts 430,, b, cand d with the walls of the grooves 42a, 2), c and d in which they lie.In Figs. 11 and 16 the upper die foot 42 is shown in mid-position. Fig.16 also shows a blank B in position to be trimmed.

On movement of the lower die 60 backward toward the rear of the press(into the position of Fig. 17) the die insert 64a of said lower die willmove into the passageway 40a in the upper die. With the upper die thefoot 42 thereof will move simultaneously: rearward, moving the. keyinserts 4.3a, flab-with it by reason: oft. the engagement atthewalls-of. the: grooves 42a, 4211 with the! doWn.-- wardextensiom ofthesekey inserts43a, 43b-.

7 During thistmotion of the foot42, the keyinserts 430,-; 431i remainstationary because their extensions .liQxifl' the-.eroovestflc lzd whichrunin the direction of motion ot the-foot. 42 and henoeithe foot-canmove: while those key-inserts 43c, Hal-do;- notz, a

Movement of .thelower die 60- forward; (intothe position aof Fig. .18causes no.motion-.01 thev key inserts-430,4. torythe, samereason-.as-irr the: receding;v paragraph; but the lower insert 6.4b.:Wi1]; moveinto the-passageway 40h key .in'sert. 43al-will move: outofthe'passagewayllla' fionthe same reasons 7 the 1 opposite.-= motion .1was brought aboutfluring-backward. movement of. the.

loweradie. I

Movement: otthe lower die tovthewright -(into: the? position f:.1.ig-,..1.9from centeror. Fig: 16 position) :will: move; the die insert{Ste 011 the lower:

dieeintow the: passageway; 400:, at the; same; time;

thekem insert -43cin. the upperdiei 40 will: move inwardly: or itspassageway 40candv key; insert. Ndv will. move outwardlyof. itspassageway 40,

-' becauseeof. the; extensions 3. on. those inserts: 43s,;

fidubeinggengaged .by the. walls .of the grooves 1420;, 421mm which;they lie lower die- 60: transversely (either to theright :or left)..-wi-lit notmove the hem inserts 4:311, 431% be-- causesthein;extensions: lie in transverse: grooves:

0.1m;Ito-revetment. of 1 thev lower CUE-'1 6011701 theqleft (into theposition of the:key inserti43d will! mover-inwardlyofiits; passage 40dand the die insertafihi: will; enter: passage; 4011' and. the keyinsert;,4.3c/ will; move outwardly of. passage: 40.0.,

Each.- one: of the ifour above-describedrmovemerits-shears ofi part:ofjthe b-lank;=,wall-..or-makess one cuti-ofigtheptrimmingoperation. Qncomplea tiona ofi alll; fonr;.. the blank willrbecompletelyi trimmed,having: the.- shapeillustrated the.

bottom:part:of.-;Fig;-, 3. Theetrimmedc-ofi, portion: istscrappedzz.It:may on;may not beinione-apiece;

asa.-shown,,]sinee=it;.is stretichedljby whichever key insert:isaeopposite': the die in'ser.t; thazt:at the. momentisiaperformingeaicsheaifing or: cutting:opera}.'-

The ,-'movement., ot; the

I64 through which-the upper die-;passes. When the maehineis. inactive;the: plate-isheld. against arms. I 62 extending. from the press frame bya pair of spring l fiil orr either siderof. themounting Mm for thequpperdie..earrying,.;bracket.41 the upper. endsof. the springsleeing;attachedto said bracket by pins I 64, while. thelower-endeare I .permit passage.of; the die and. foot, .will strip ofilrany. scrap;.or the blanle that.may havelbeen retai'n'edlonlthe. die. or die=f00t .42...

To. locate. and guidethe returntofqthe stripper plate 1610/170 itsuppermost or at rest position,. downwardly-extending. parallel pins; 65:arei drivenzinto-tlfie arms .162. (See. F.!igs.,.'?-.-and=f15.;)

. the stripper plate |6n.,rises,, thesepins enter tion. 1 The:stretching: is';. due to .the: moving of."

the keyzinsertioutward; of; itsspassageway against the uncut-wall of:the blank-2.. ('Eor-exa-mpleisee kemzinsert 43b ;in; -Fi'g-...17stretching; theptonw llz.

' ottne hlankiBzl- Aiterithetlast cutiszmade, the;upper:die with .thevertical slideir32i'by 'reas'omofi. the:

lourw-partqflbr of: the cam .38 .coming; intox.-engag.e:-

meat: with the slide. roller 39.2 permitting; springs. 351.110 :raise;the. slides 32 l die .40.;carried; thereby. Thereupon theplatfornrfiglircarryingean trimmedt 'blanlc (like .0 inlFig. 39 willarisfrom the identicali studs. 41s: onulth mounting brackets-of thenpperdier (see-Fig; 4a);v These smdsalsotsenvei t'o'el'ocate the: diesvertibally; The studendszzabut;

when-the horizontal i cuttingl-surfaeessxot?theadies;

e m t-whey may =move laterally toetm'm: at blankwithout:- striking:oneganother.

. The.stripper mechanism rm order tm strip the; blank": including the:trimmed scrap from; the. upper die;. a:; strippem holes 11.616 therein,maintaining. the strippereplate.

' in. position; as; the up-Deroie-AU and:die;-foot. 42-

withdraw from the stripper -aperture l 6|.

From ,the foregoing it. may bev understood. that anpperator. placing.ablanl; on the depressibleplatform 6| inethe. center of the. lower.die.v then place .her hands, .onthe handlesot leversc L. ancl'r; causingthe clutch; mechanism. itonoperatel and starting. the. press; Thereupomthe. slide 32 will be moved ,downby cam.38 causingv footAZ. of upper.die Aflltoenter the bl'ank. and press it and; the platform. 6.1. downinto; the, position of- Then the lwinge'djcam. '35 .will operate.thelever. 52Tand'pawlcarryingsliki'e 53'to. rotatethe ratchet member,9U1andto move the-slide B'Dlandlower die- Giltfrom. contra-For neutral,"position tothe .iright.

a'ndto Ithe left andto .move rtheslides JUIiand .811. and; the lowerdieeforwardgand'ltothe/rear Inso moving the die 6!) i vvill returrito.'centraljpos'ition. after movement, in any; direction Before moving in,another. directiorr. it e.,.returning.;to,center.

{ fromflrieht'fbeforelmoving to left, forward'or totwarditherear...

The foregoing movements .will make, four .cuts on the blank, aspreviously describedjland'las typicallmillustratedFig. 2

On. c'ompletionofi the cuts',',}the rotationtof the cam; 38.Will'permit. the slide-32. to..be..raised.jl$5,

- springs- 31,. whereupon.th e blankjhcarryi gq plat form LWilLTraise;the tr mmem ne. from. the lower opening; and the stripperflffi'fl'lwill" stripe offfthe'. blank .01; any sQrapH'retaiIiednori..the;up.per. diejas.

it passes. through the. stripperjopeuingg. The pnessv wi lh them be.ready. 'for; trimming another blankn thev following-J claims, formihgliis .usedjin.

asgeneral sensel'to. embrace trimming. .andisimilar operations. a v vMany.modifications- Within thescope .ofifniy; in.-

. vention-. ;wil-L. occur, to; tliose. skilldiin'jthe are.

Therefore Ldolnottlimit'itto. thespecifio embodL.

' mentillustratedand-desoribedl.

Lclainr: I

1. In a press/a die movable upgandidownb'etweenidle and operativepositions,.. a second die" movable transversely to saidlup. andjdown.movement in a. plurality, v of directions. from a central plateraces-preview. Thisrplateha'szarrraperturea '3' position to p rform aplurality of; formin opera tions on .a hollow blank while the first dieremains stationary, a plurality of sliding means one Of which is movableindependently of another, rotary means cooperating with said slidingmeans to move said rotary means step by step.

2. In a press, a die movable up and down between idle and operativepositions, a second die movable transversely to said up and downmovement in a plurality of directions from a central position to performa plurality of forming operations on a hollow blank while the first dieremains stationary, cooperating rotary means and sliding means movablestep by step for moving said-second die in said directions, and means onsaid rotary and sliding means to complete all the forming movements ofsaid second die for one blank in a fraction of each rotation of saidrotary means.

3. In a press, a die movable up and down between idle and operativepositions, a second die movable transversely to said up and downmovement in a plurality of directions from a central position to performa plurality of forming operations on a hollow blank while the first dieremains stationary, a resilient support for the blank cooperating withsaid second die, said sup-.

port descending into said second die as said first die carries the blankto operative position and automatically rising with the first die oncompletion of the forming operations to expel the formed blank fromwithinthe second die, a plurality ofsliding means one of which ismovable independently of another, rotary means cooperating with saidsliding means for moving said second die in said directions.

4. In a press, a die movable up and down between idle and operativepositions, a second die movable transversely to said up and downmovement in a plurality of directions from a central position to performa plurality of forming operations on a hollow blank while the first dieremains stationary, a resilient support for the blank cooperating withsaid second die, said support descending into said second die as saidfirst die carries the blank to operative position and automaticallyrising with the first die on completion of the forming operations toexpel the formed blank from within the second die,

. strippingmeans cooperating with the first die tween idle and operativepositions, a second die movable transversely to said up and downmovement in a plurality of directions from a central position to performa plurality of forming operations on a hollow blankwhile the first dieremains stationary, a foot associated with said first die and receivablewithin the blank to carry the blank into position to be operated upon,means holding said foot in sliding engagement with said first die andpermitting it to move with said second die and blank during the formingoperations, and interengaging means between said first die and its footto guide the movement of said foot in the paths of movement of saidsecond die, said interengaging means serving to return the blank tocentral position after each forming operation,

6'. In a press, a die movable up and down be-- tween idle and operativepositions, a second die movable transversely to said up and downmovement in a plurality of directions from a central second die andblank during the forming opera-- tions, interengaging means between saidfirst die and its foot guiding the movement of said foot in the paths ofmovement of said second die, and cooperating rotary means and slidingmeans for moving said second die in said directions.

7. In a press, a die movable up and down between idle and operativepositions, a second die movable transversely to said up and downmovement in a plurality of directions from a central position to performa plurality of forming operations on a hollow blank while the first dieremains stationary, a foot associated with said first die and receivablewithin the blank to carry the blank into, position to be operated upon,a resilient support for the blank cooperating with said second die, saidsupport descending into said second die as said first die carries theblank to operative position. and automatically rising with the first dieon completion of the forming operations to expel the formed blank fromwithin the second die, means holding said foot in sliding engagementwith said first die and permitting it to move with said second die andblank during the forming operations, and-interengag- ,ing means betweensaid first die and its foot to guide the movement of said foot in thepaths of movement of said second die.

, 8. In a press, a die movable up and down between idle and operativepositions, a second die movable transversely to said up and downmovement in a plurality of directions from a central position to performa plurality of forming operations on a hollow blank while the first dieremains stationary, a foot associated with said first die and receivablewithin the blank to carry the blank into position to be operated upon, aresilient support for the blank cooperating with said second die, saidsupport descending into said second die as said first die carries theblank to operative position and automatically rising with the first dieon completion of the forming operations to expel the formed blank fromwithin the second die, means holding said foot in sliding engagementwith said first die and permitting it to move with said second die andblank during the forming operations, interengaging means between saidfirst die and its foot to guide the movement of said foot in the pathsof movement of said second die, and cooperating rotary means and slidingmeans for moving'said second die in said directions.

. 9. In a press, a die movable up and down between idle and operativepositions, a second die movable transversely to said up and downmovement in a plurality of directions from a central position to performa plurality of forming operations on a hollow blank while the first dieremains stationary, a foot associated with said first die and receivablewithin the blank to carry the blank into position to be operated upon, aresilient support for the blank cooperating with said second die, saidsupport descendin into said second die as said first die carries theblank to operative position and automatically rising ing engagement-withsaid first die and'per mittingitto movewith said second die and blankduring the forming operations, interengag-ing means between said firstdie and its foot to'guide the movement of said foot in the pathsofmovement of said second. die, cooperating rotary means andslidingmeans movable step b'y step for'moving said second die in'saiddirections, and means to advance said rotary means in a step by stepmovement. ""10, In apress having'upper and lower dies, means to lowerthe upper die from idlefposition to cooperative position; with thelower-die, means operating when 'said dies are in cooperative positiontomove the lower die relative to the upper die, means on the lower .diecooperating withthe upper die to perform a forming operation one. blankduring :said relative movement, means to position the forming means on.saidlower die, said positioning means being constructed and arranged tolocate and secure said :forming means on said lower die, with itsworking surfaces in'thesame relation to the die surface after redressingas before.

.11. In a press of thecharacter described, a lower die 1 having aninsert vmounted thereon, an adjustment member engaging the lower edge ofagroove on the insert, said groove being so con structed and arrangedthat when the working surfaces and the. base of said die and insert areground to redress them after wear said adjustment member will alwaysengage the lower edge of said groove to hold the insert firmly seated.

'12. In a press ofthe character described, a lower. die having an;insert located in a slot in the .top face .of the :die, a securingmember in said die engaging the lower edge of a groove in the side ofsaid insert, said groove being so constructed and arranged that ongrinding the working surfaces and base of said insert and die thesecuring member will' always engage the lower edge of the grooveto holdtheinsertseated 13. In a press, of the character described, a lower diehaving" an insertlocated in aslot in the top face ofthe die, a securingmemberin said I die engaging the lower edge of a groove in the side ofsaid insert, said groove. being so constructed and arranged that ongrinding the working surfaces andbase ofsaicl insert anddiethe securingmember willalways engage the? lower edgeof the groove to hold the insertseated firmly; and an adjustment member in said dieito adjust the insertlongitudinally.

i 14. In apres s, a lo Jerdie movable horizontally and'having anaperture, an upper die vertically movable into cooperative relation tothe lower die, afoot on the upper die receivable in a blank and with theblank being receivable in'said aper-' '16. In a press, cooperating dies,a plurality of slidable devicesifor moving "one ,die, and means formoving said slid-able devices comprising irotary means, cam meanscarried by said rotary meansand causing movement of said slidabledevices from a neutral position in a plurality of difierent directionsto-cause corresponding movement of said die, means to advance saidrotary means in a step by step movemenhand means to prevent overtravelof said rotary means beyond a predetermined point in each advance.

17. In a press, cooperating dies, a plurality :of slidable devices formoving one die, and means for moving said slidable devices comprisingrotary means, cam means' carried by said rotary means and causingmovement of said slidable devices vfrom a neutral position in aplurality of different directions to'cause corresponding movement ofsaid die, means to advance said rotary means in a step by stepmovementyand means to prevent overtravel of said rotary means beyond apredetermined point in each advance, commeansand causing movement ofsaid slidable I devices from a neutral position in a plurality ofdifferent directions to'cau'se corresponding mover'n'ent of said die,and means to advance :said rotary means in 'a step by step-movement.

prising a catch engageable rotary means.

.18. In 'a press, cooperating dies, a plurality of slidable devices formoving one die, and means for moving said slidable devices comprisingrotary means, cam means carried by said rotary means and causingmovement of said slidable devices from :a neutral position in aplurality of different directions to cause corresponding movement ofsaid die, means .to advance said rotary means in a step by stepmovement, means to prevent overtravel of said rotary means beyond apredetermined point in each advance, and means renderingsaid'overtravel-preventing-means operative when said advancing meansisactive.

' 19. In a press, cooperating dies, a plurality of slidable devices formoving one die, and mea-ns for moving said slidable devices comprisingr0- tary means, cam means carried by said rotary means and causingmovement of :said slida'ble devices from a neutral position in aplurality of different directions to cause corresponding movewithnotches in said ment; of said die, means to advance said rotary means ina step by step movement m'e'ans to prevent overtravel of, said rotarymeans beyond a predetermined pointin each advance, and means rendering.saidovertravel-preventing means inoperative. when said advancing meansbecomes'inactive.

20. In a press, cooperating dies, *aplurality of slidable devices formoving one die, and means for moving said slidable devices comprisingrotary means, cam means carried by said rotary means and causingmovement of said slid-able devicesfrom a neutral position in a pluralityof different directions to cause corresponding movemerit of said die,means to advance said rotary means ,in a stepby step movement, means toprevent overtravel of said rotarymeans beyond a predetermined point ineach advance, means .renderingsaid overtravel-preventing means opertarymeans, cam means carried by said rotary means and causing movement ofsai'd-slidable-de vices from a neutral'positiqn m a plurality ofdifierent-directions to cause corresponding movementor isaiddie, meansto advance said rotary means in a step by step movement, means toprevent overtravel of said rotary means beyond a predetermined point ineach advance, comprising a catch engageable with notches in said rotarymeans, and a lost motion connection between said catch and saidadvancing means.

22. In a press, rotary means for causing operation of a die, means toadvance said rotary means in a step by'step' movement, means. to preventovertravel of said rotary means beyond a predetermined point in eachadvance comprising a catch engageable with notches in said rotary means,and means rendering said catch inactive when said advancing meansbecomes inactive.

23. In a press, a plurality of slidable devices for moving a die, cammeans acting on said devices to move them in angularly difierentdirections from a central position, rotary means carrying said cam meansand operating said devices as said cam means are moved into engagementwith said devices, two of said cam means being positioned to causesuccessive movements of one slidable device in opposite directions andlater to cause successive movements of another slidable device in anangularly different direction as said rotary means rotates.

24. In a press, a plurality of slidable devices for moving a die, cammeans acting on said devices to move them in angularly difierentdirections from a central position, rotary means carrying said cam meansand operating said devices as said cam means. are moved into engagementwith said devices, one pair of said cam means being positioned to causesuccessive movement of one slidable device in opposite directions andanother pair of said cam means being positioned to cause latersuccessive movements of a second slidable device in angularly differentdirections from said first slidable device and a third pair of said cammeans being positioned to cause said one slidable device to move againin said opposite directions after said second device has completed itsmovement, said movements of said slidable devices occurring duringapproximately 90 rotative movement of said rotary means.

25. In a press, a pair of slidable devices for moving a die, three pairsof cam means and a complete operation on a blank by said die comprisingmovements of one slidable device in. two directions and of the secondslidable device in two directions angularly different from the firstslidabl device, the first slide being moved in three operations by thefirst, third and second pairs of cam means in that order, the secondslidable device being moved during said three operations by the second,first and third cam means in that order. 26. In a press, a plurality ofslidable devices for moving a die in different directions from a givenposition, rotary means, cam members carried by said rotary means andoperating on said slidable devices to move them in different directions,supporting means in which said rotary means is mounted for rotation,said supporting means and rotary means having cooperating taperedsurfaces.

27. Ina press, cooperating dies constructed and arranged to haverelative transverse movement, one of said dies having a slidable partreceivable within and movable with the other die while said one dieremains stationary, means holding said sliding part against said onedie, and movable means carrying and moving said other die, said holdingmeans comprising a rod.

having a swivel connection with said sliding part and passing through apassage in said carrying means, said passage having arr-enlarged upperportion, a sleeve on said rod and received in said enlarged portion andhaving a curved bottom end seated in a complementary curved bottom ofsaid enlarged portion, securing means on said rod engaging the upper endof said sleeve whereby said rod may pivot about the engagement of saidcurved portions.

28. In a press, cooperating dies constructed and arranged tohaverelative transverse movement, one of said dies having a slidable partreceivable within and movable with the other die while said one dieremains stationary, means holding said sliding part against said onedie, and movable means carrying and moving said other die, said holdingmeans comprising a rod having a, swivel connection with said slidingpart and passing through a passage in said carrying means, said passagehaving an enlarged upper portion, a sleeve on said rod and received insaid enlarged portion and having a curved bottom end seated in acomplementary curved bottom of said enlarged portion, securing means onsaid rod engaging the upper end of said sleeve and adjustable to givesmall clearance between said die and its sliding part, and resilientmeans to take up said clearance but permitting said rod to pivot aboutthe engagement of said curved portions.

29. In a press, cooperating dies constructed and arranged to haverelative transverse movement, one of said dies. having a slidable partreceivable within and movable with the other die while said one dieremains stationary, means holding said sliding part against said onedie, and movable means carrying and moving said other die, and means toguide the sliding movement of said slidable part comprising insertsslidably fitting in slots in said one die and having key projectionsinto grooves in said sliding part, said key projections cooperating withsaid grooves to cause in and out movement of certain of said insertswithin their slots as said slidable [part is moved inthe direction ofthe slots within which the certain inserts fit.

30. In a press, cooperating dies constructed and arranged to haverelative transverse move ment, one of said dies having a slidable partreceivable Within and movable with the other die while said one dieremains stationary, means holding said sliding .part against said onedie, and movable means carrying and moving said other die, means toguide the sliding movement of said slidable part comprising insertsslidably fitting in slots in said one die and having key projectionsinto grooves in said sliding part, said key projections cooperating withsaid grooves to cause in and out movement of certain of said insertswithin their slots as said slidable part is moved in one direction, andsimilar keyed inserts similarly cooperating with similar slots andgrooves in said die and slidable part as the latter is moved in a,direction angularly different from said one direction.

31. In a press, cooperating dies constructed and arranged to haverelative transverse movement, one of said dies having a slidable partreceivable within and movable with the other die while said one dieremains stationary, means holding said sliding part against said onedie, and movable means carrying and moving said one die, means to guidethe sliding movement of said slidable part comprising inserts sliclablyfitting. in slots in said one die and havingkey projections into groovesin said sliding part, said keyprojections cooperating with said groovesto cause in I and 'outmovement of certain of said inserts within-theirslots as said slidable part is moved in one direction, and similar keyedinserts simi-- larly cooperating with similarslots and grooves in saiddie and slidable part as the latter is moved in a direction angularlydifferentlfrom said one direction, the groove receiving the keyprojection of an insert being at right angles to the slot in which saidinsert fits whereby. on movement of said sliding part in the direction Iv of the groove said insert will remain stationary.

32. In a press, a die movable up and down between idle and operativepositions, a second die movable transversely to said up and downmovement in a plurality of directions from a central position to performa plurality of forming operations on a hollow blank while the first dieremains stationary, cooperating rotary means and sliding meanscomprising a p-luralityof camactuated members working in a single pathfor moving said second die in said directions, and

means to move said rotary means step by step.

33. In a press, a die movable up and down between idle and operativepositions, a second die movable transversely-tosaid up and down movementin a plurality of directions from a central position to perform aplurality of forming opera' tions on a hollow blank whilethe first diere-'- mains stationary, cooperating rotary means and sliding meanscomprising a plurality of cam-actuated members Working in a single pathfor moving said second die in said directions.

34. In a press, a die movable up and down between idle and operativepositions, a second die of said rotary means.

35. In a press, a die movable up and down between idle and operativepositions, a second die movable transversely to said up and downmovement in a plurality of directions from a central I position toperform a plurality of forming operations on a hollow blank while thefirst die remains stationary, cooperating rotary means and sliding meansmovable step by step for moving said second die in said directions, andmeans on said rotary and sliding means comprising a plurality'of camactuated means Working in a single path to complete all the formingmovements of said second die for one blank in a fraction of eachrotation of said rotary means.

URI D. FOSTER.

